Method of protecting digest authentication and key agreement...

Details Method of protecting digest authentication and key agreement... Method of protecting digest authentication and key agreement...

2011-03-15

2011-03-15

Zand, Kambiz (Department: 2434)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S171000, C726S004000, C380S028000

Reexamination Certificate

active

07908484

ABSTRACT:
Disclosed is a method and system to discourage a MITM attacker in a data communications system that includes client and a server. The method includes, in a Digest Authentication and Key Agreement (AKA) challenge sent to the client from the server, setting an “algorithm” field to ‘algorithm=“AKAv1-HMAC-MD5”’ for directing the client to use the HMAC-MD5 keyed hash function when producing Digest credentials; and using at least one of an AKA Integrity Key (IK) or an AKA Cipher Key (CK) in the keyed hash function.

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